Central Limit Order Book (CLOB)

A Central Limit Order Book (CLOB) is the traditional exchange microstructure where buy and sell orders are collected in a centralized venue, matched by price-time priority, and executed when a buyer’s bid crosses a seller’s ask. CLOBs support limit orders (resting liquidity at a specified price) and market orders (immediate execution at the best available price). In crypto, high-performance CLOBs are used by centralized exchanges like Binance and Coinbase, and increasingly by on-chain venues like Hyperliquid and dYdX that run the matching engine off-chain while settling on-chain. The main advantage of a CLOB over an AMM is price discovery efficiency: the order book aggregates dispersed information from multiple traders into a single price, with tighter spreads and lower slippage for large orders in liquid markets. The main disadvantage in DeFi is on-chain CLOB implementation complexity — storing and matching orders on a blockchain is gas-intensive, which is why most DeFi CLOBs keep order matching off-chain.

Related terms

• Automated Market Maker (AMM)
• Slippage
• Request for Quote (RFQ)
• Smart Order Routing

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